EP2066034A2 - Capteur anti-pincement - Google Patents

Capteur anti-pincement Download PDF

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Publication number
EP2066034A2
EP2066034A2 EP08020675A EP08020675A EP2066034A2 EP 2066034 A2 EP2066034 A2 EP 2066034A2 EP 08020675 A EP08020675 A EP 08020675A EP 08020675 A EP08020675 A EP 08020675A EP 2066034 A2 EP2066034 A2 EP 2066034A2
Authority
EP
European Patent Office
Prior art keywords
measuring
sensor
electrode
electrodes
measuring electrode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08020675A
Other languages
German (de)
English (en)
Other versions
EP2066034A3 (fr
Inventor
Holger WÜRSTLEIN
Thomas Weingärtner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Brose Fahrzeugteile SE and Co KG
Original Assignee
Brose Fahrzeugteile SE and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Brose Fahrzeugteile SE and Co KG filed Critical Brose Fahrzeugteile SE and Co KG
Publication of EP2066034A2 publication Critical patent/EP2066034A2/fr
Publication of EP2066034A3 publication Critical patent/EP2066034A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/945—Proximity switches
    • H03K17/955—Proximity switches using a capacitive detector
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/40—Safety devices, e.g. detection of obstructions or end positions
    • E05F15/42—Detection using safety edges
    • E05F15/46—Detection using safety edges responsive to changes in electrical capacitance
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2800/00—Details, accessories and auxiliary operations not otherwise provided for
    • E05Y2800/34—Form stability
    • E05Y2800/342—Deformable
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/50—Application of doors, windows, wings or fittings thereof for vehicles
    • E05Y2900/53—Type of wing
    • E05Y2900/531—Doors
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/50—Application of doors, windows, wings or fittings thereof for vehicles
    • E05Y2900/53—Type of wing
    • E05Y2900/55—Windows
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
    • H03K2217/96—Touch switches
    • H03K2217/96015—Constructional details for touch switches
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
    • H03K2217/96—Touch switches
    • H03K2217/9607—Capacitive touch switches
    • H03K2217/960735—Capacitive touch switches characterised by circuit details
    • H03K2217/96075—Capacitive touch switches characterised by circuit details involving bridge circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
    • H03K2217/96—Touch switches
    • H03K2217/9607—Capacitive touch switches
    • H03K2217/960755—Constructional details of capacitive touch and proximity switches
    • H03K2217/960775—Emitter-receiver or "fringe" type detection, i.e. one or more field emitting electrodes and corresponding one or more receiving electrodes

Definitions

  • the invention relates to a pinch sensor, in particular for detecting an obstacle in the path of an actuating element of a Kraf familias, with a first measuring electrode and with a spaced from the first measuring electrode, electrically separated second measuring electrode, wherein the first measuring electrode for generating an external electric field relative to the second measuring electrode is trained.
  • the invention further relates to a sensor device with such a pinch sensor, wherein a measuring electronics for evaluating the measuring capacitance between the measuring electrodes is provided.
  • a pinch sensor of the aforementioned type uses the capacitive measuring principle to detect an obstacle.
  • an external electric field is built up by means of the two measuring electrodes. If a dielectric enters this electric field, the capacitance of the capacitor formed by the measuring electrodes changes. In this way, theoretically an obstacle in the path of an actuating element of a motor vehicle can be detected, provided that its relative permittivity ⁇ r differs from the relative permittivity of air. Also, a change in capacitance is caused by a short to ground of the penetrating obstacle, since this changes the charge distribution on the measuring electrodes.
  • the obstacle in the path of an actuator is detected without physical contact with the pinch sensor. In other words, it is a so-called contactless sensor. If a change in capacitance is detected, timely countermeasures, such as stopping or reversing the drive, can be initiated before the obstacle is actually jammed.
  • the control elements of a motor vehicle may be, for example, an electrically operable window, an electrically operated sliding door or an electrically operable tailgate. Also can be based on the capacitive measuring principle pinching be used for the detection of obstacles in the case of an electrically actuated seat.
  • a pinch sensor of the type mentioned is, for example, from the US 6,972,575 B2 known. Between the two measuring electrodes there is arranged a base electrode which effects a shielding on the direct connecting line between the measuring electrodes. In this way, the sensitivity of the pinch sensor to obstacles in the external electric field is increased.
  • a pinch sensor of the aforementioned type is known, wherein in addition to a capacitance detection between the two measuring electrodes whose electrical contact is registered at an external force.
  • the measuring electrodes are embedded in an elastomeric material and spaced from one another via a hollow chamber.
  • a pinch sensor of the type mentioned above wherein the external electric field constituting the measuring electrodes are designed to be movable to each other. This is realized for example by a cavity or by means of an elastic material.
  • the object of the invention is to provide an improved, working on the capacitive measuring principle pinch sensor of the type mentioned, which is suitable for both a non-contact and a tactile detection of obstacles.
  • a pinch sensor which comprises a first measuring electrode and an electrically separated second measuring electrode spaced from the first measuring electrode, wherein the first measuring electrode is designed to generate an external electric field with respect to the second measuring electrode, and wherein the first and second measuring electrodes are elastically mounted relative to an electrically separated base electrode are.
  • the invention is based on the consideration not to detect a respective capacitance between the measuring electrodes and the base electrode, but a differential capacitance between the two measuring electrodes.
  • the differential capacitance is influenced both by the approach of an external obstacle to the external electric field formed by the two measuring electrodes and by a change in the position of the base electrode.
  • the charge distribution on the measuring electrodes is also influenced by a change in position of the base electrode lying opposite to the measuring electrodes on a ground potential, such as ground.
  • the specified pinch sensor is at the same time suitable as a non-contact and as a tactile sensor solely by the provision of an elastic mounting of the measuring electrodes relative to the base electrode. Both measuring principles are realized by the detection of the differential capacitance between the measuring electrodes.
  • a contamination or a water film on the surface of the pinch sensor acts in terms of the differential capacitance between the measuring electrodes, such as the introduction of a dielectric into a capacitor. Since soiling and water is a relative Dielectric constant greater than air, in the case of superficial pollution or exposure to water will increase the capacitance between the measuring electrodes.
  • the specified pinch sensor is thus able to distinguish between an obstacle penetrating the hazardous area and a superficial contamination with dirt or water.
  • An increase in the measuring capacity can thus be assigned to a surface loading and a reduction in the measuring capacity, in particular during a movement of the actuating element, can be interpreted as a trapping case.
  • the first measuring electrode is subjected to an alternating voltage by means of a suitable voltage generator in relation to the basic potential, such as ground.
  • the second measuring electrode is connected to the basic potential via an impedance.
  • the measuring capacity between the two measuring electrodes for example be tapped via a switched between the second measuring electrode and the ground potential measuring bridge (by means of the impedance) as a phase or as an amplitude information of a voltage value.
  • the invention is not fixed to a specific arrangement of the measuring electrodes relative to the base electrode.
  • the measuring electrodes relative to the base electrode can be arbitrarily positioned in Einklemmsensor. Any change in position of the measuring electrodes relative to the base electrode will lead to a changed charge distribution and thus to a changed measuring capacity.
  • first and second measuring electrodes are arranged on a first plane, which is spaced from a second plane in which the base electrode is arranged.
  • a structurally flat pinch sensor can be realized, which can be easily guided for example along the closing edge of a movable actuating element.
  • the base electrode it is not necessarily required to make the base electrode as a sensor component.
  • the anti-pinch sensor can only be equipped with the two measuring electrodes and the body connected to ground of a motor vehicle can be placed. In this case, the body as such forms the base electrode.
  • the base electrode itself is a sensor component and for this purpose embedded in the sensor body.
  • the elastic support can be realized both by the aforementioned intermediate layer of an elastic material be, over which the measuring electrodes are spaced from the base electrode.
  • the action of an external force on the sensor body will lead to an approximation of the measuring electrodes to the base electrode.
  • the measuring electrodes are each arranged in an edge region of the anti-pinch sensor.
  • the measuring capacity is reduced due to the greater distance between the measuring electrodes to each other.
  • the changes in the measuring capacity caused by an obstacle are increased in relation.
  • the sensitivity of the anti-pinch sensor is improved by this measure.
  • the range of the external electric field can be increased by the arrangement of the measuring electrode in an edge region of the anti-pinch sensor.
  • the above-described pinch sensor is not fixed.
  • the electrodes are each formed flat, which in turn allows a flat configuration of the pinching sensor. Also, a good alignment of the external electric field is possible on such a flat configuration of the electrodes and it can in turn achieve a high range.
  • the surface of the base electrode projects over the surfaces of the further measuring electrodes in projection. In this way, the largest possible change in the measuring capacity is ensured when approaching the base electrodes to the measuring electrodes in a simple basic structure of the pinching.
  • a third measuring electrode which is electrically separate from the first and the second measuring electrodes, is provided, which is adjacent to the second measuring electrode, wherein the measuring electrodes for forming a first external electric field between the first and second measuring electrodes and a second external electric field between the first and third measuring electrodes, and wherein the second external electric field has a shorter range than the first electric field.
  • differences in the detected changes in the capacitances associated with the two outer fields can be used to detect a superficial contamination of the sensor body with dirt or water.
  • a thus formed pinching sensor thus makes it possible to detect a dirt deposit or water wetting on the surface of the sensor as a DC signal and an approaching obstacle as a difference signal and to distinguish in this respect.
  • the different range of the electric fields generated by the measuring electrodes can be influenced or achieved by the geometry and / or dimensioning of the respective measuring arrangements.
  • the third measuring electrode to achieve a short-range electric field as possible be designed such that the field lines have a direct as possible course between the third and the first measuring electrode.
  • the second measuring electrode can be configured, arranged or dimensioned such that the field lines of the generated electric field with respect to the first measuring electrode in the manner of a stray field capacitor take the longest possible detour through the danger zone of the actuating element.
  • the third measuring electrode of the first measuring electrode can be arranged directly adjacent, whereas the second measuring electrode is spaced from the counter electrode.
  • the second measuring electrode is located in an edge region of the pinching sensor, and the third measuring electrode is arranged between the first and the second measuring electrode.
  • the capacitance of the capacitors formed in each case can be determined or adapted in a known manner via the size of the surface.
  • the range of the first outer electric field extending into the hazardous area can be increased by increasing the area of the second measuring electrode.
  • the dimensioning is chosen such that deposition of dirt or water on the surface of the sensor leads to an approximately equal change in the capacitance of the capacitors comprising the second and third measuring electrodes.
  • One out of the capacities of the two Condensers formed differential signal thus undergoes substantially no or only a negligible change by contamination or by water wetting the surface of the sensor.
  • the electrodes and the intermediate layer are arranged in a sensor body made of a flexible carrier material.
  • the sensor body may be formed as a flexible ribbon cable.
  • the sealing body is intended to seal the actuating element relative to the closing edge in the closed state.
  • a sealing lip may be mentioned, which seals an operable side window of a motor vehicle relative to its closing edge.
  • a flexible ribbon cable is also referred to as FFC ("Flexible Flat Cable”), and is characterized by the fact that in a flexible cable body parallel conductor structures are laid.
  • FFC Flexible Flat Cable
  • a flexible conductor structure can also be used as the sensor body.
  • a flexible conductor structure is also known by the term FPC ("Flexible Printed Circuit").
  • FPC Flexible Printed Circuit
  • printed conductors are specifically arranged or laid in a flexible insulating material, in particular in a multilayer arrangement. Such a configuration allows a high degree of flexibility with regard to the dimensioning and arrangement of the individual strip conductors, so that the measuring electrodes of the pinching sensor can be arranged or dimensioned in the desired manner.
  • the sensor body extends substantially along a longitudinal direction, wherein in an expedient embodiment, the first measuring electrode along the longitudinal direction is divided into individually controllable individual electrodes.
  • the capacitance measurable between each of the measuring electrodes is reduced, since the entire surface of the measuring electrodes is divided into a plurality of interrupted individual areas of the separate individual electrodes.
  • a low, total between the measuring electrodes However, forming capacity leads to a small capacity change in relation to the total measuring capacity can be detected easily.
  • a pinch sensor designed in this way also allows the detection of a change in capacitance by means of a multiplex method.
  • the individual electrodes can be controlled by means of separate supply lines either offset in time (serial) or simultaneously (in parallel).
  • a segmentation alone of the first measuring electrode acting as a transmitting electrode has the advantage that a local and / or temporal control is possible, but only one evaluation, namely the non-segmented further electrodes, is provided or must be performed. In a further preferred variant, however, all measuring electrodes are subdivided into individual electrodes.
  • a second base electrode as a sensor component, wherein the leads are arranged for shielding between the two base electrodes.
  • Such an arrangement avoids direct capacitances of the leads both with external surfaces located at another potential and with the individual electrodes.
  • Another object of the invention is to provide a comparison with the prior art improved sensor device, with both a direct contact as well as a contact jamming case is detected.
  • a sensor device with a pinching sensor of the type described above wherein a measuring electronics for detecting a measuring capacitance between the first and the second measuring electrode is provided.
  • the measuring electronics are designed to identify a measuring capacity which reduces in relation to a basic capacity as a trapping case.
  • a measuring capacity which reduces in relation to a basic capacity as a trapping case.
  • an obstacle with a ground fault entering the detected hazardous area leads to a reduction of the measuring capacity.
  • the measuring capacity is reduced by direct contact of the sensor with an obstacle.
  • a decreasing measuring capacity is an indication of the presence of a trapping case.
  • the measuring electronics are designed to identify a measuring capacity which increases in relation to a basic capacity as superficial contamination or water exposure of the sensor. As stated, such an act of acting as the introduction of a dielectric having a larger relative dielectric constant in the capacitor between the first and the second measuring electrode.
  • the measuring electronics is advantageously for detecting a Drift of the capacitance between the first and the second measuring electrode with respect to a capacitance between the first and the third measuring electrode designed.
  • a superficial deposit of dirt or water leads to an equal change of the two measuring capacities, whereas an obstacle penetrating from the far field initially only affects the measuring capacitance between the first and the second measuring electrode.
  • a trapping case can clearly be distinguished from a measuring artifact caused by superficial contamination or water.
  • the measuring electronics are preferably designed to control the individual electrodes separately and to evaluate their measuring capacitances individually.
  • a sensor device 1 which comprises a capacitive pinch sensor 2 and a measuring device 3 for detecting a measuring capacity.
  • the capacitive pinching sensor 2 is shown in a cross section.
  • the sensor body 4 in the interior of which a first planar measuring electrode 5 and a second flat measuring electrode 6 are arranged.
  • the two measuring electrodes 5, 6 are arranged opposite a flat base electrode 8 in an elastic and electrically insulating sensor material 10.
  • a sensor material 10 for example, an elastomeric plastic or a rubber may be used.
  • a sponge rubber i. H. a relatively small pore size elastic foam, or an EPDM, i. H. an ethylene-propylene-diene rubber.
  • the base electrode 8 is not part of the sensor body 4. It is rather part of the grounded body of a motor vehicle, in particular a closing edge of an actuating element such as an adjustable side window
  • the measuring electronics 3 comprises an alternating current source 12 and an evaluation circuit 14 for detecting the measuring capacitance formed between the two measuring electrodes 5 and 6.
  • the first measuring electrode 5 is subjected to an alternating voltage via the alternating current source 12 in relation to the basic potential, such as ground.
  • the evaluation circuit 14 comprises, for example, a suitable measuring bridge between the second measuring electrode 6 and the basic potential.
  • the measuring capacitance can be detected both from the phase position and from the amplitude of a voltage value tapped across the measuring bridge.
  • a change in the measuring capacitance can in particular also be determined via a difference signal of the detected phases or amplitudes compared to the corresponding values of a comparison measuring bridge with a predetermined capacitance.
  • FIG. 1 One recognizes further in FIG. 1 in that as a result of the application of the first measuring electrode 5 to an alternating voltage signal with respect to the basic potential an external electric field 17 with respect to the second measuring electrode 6 is formed. Likewise, a direct electric field 18 is formed between the first measuring electrode 5 and the base electrode 8, which is at ground potential or ground.
  • the geometry and arrangement of the measuring electrodes 5, 6 in the Sesnor Sciences 4 is chosen such that the generated outer electric field 17 extends into a hazardous area into which an obstacle is to be detected without contact.
  • the measuring capacitance detected via the evaluation circuit 14 will change.
  • such a change in the measuring capacity is based on the fact that, in the event of a ground fault, the charge distribution on the measuring electrodes 5, 6 changes.
  • FIG. 2 is the pinch sensor 2 according to Fig. 1 shown at an external force.
  • an external force 20 acts on the pinch sensor 2 when there is an obstacle between the actuator and the closing edge, and the driven element presses the obstacle against the sensor body 4 of the pinching sensor 2.
  • Such a force 20 leads to a compression of the elastic sensor material 10 in the direction of the force 20.
  • the distance between the measuring electrodes 5 and 6 with respect to the base electrode 8 is reduced as shown by the approximation of the base electrode 8, based on ground potential or mass
  • the charge distribution on the two measuring electrodes 5 and 6 changes. This change in the charge distribution can also be described by the fact that the direct electric field 18 between the first measuring electrode 5 and the base electrode 8 increases as a result of the approximate base electrode 8. In other words, field lines are subtracted from the external electric field 17.
  • the coupling of the two measuring electrodes 5 and 6 decreases; if the voltage is the same, the capacitor of the first and second measuring electrodes will store less charge. As a result, the measuring capacity decreases with respect to the relaxed state of the pinching sensor 2.
  • the anti-pinch sensor 2 shown is thus able to detect the action of an external force 20 also via a change in the measuring capacity. Both for the contactless and for the tactile detection of an obstacle or a Einklemmfalles a measuring electronics 3 for detecting the measuring capacity is sufficient.
  • a modified pinching sensor 2 ' is shown in a cross section.
  • the sensor body 4 which comprises measuring electrodes 5 and 6 embedded in an elastic sensor material 10.
  • the base electrode 8 is arranged, which sweeps over the surfaces of the measuring electrode 5 and 6 in projection with its surface.
  • a second planar configured base electrode 22 is arranged.
  • the measuring electrodes 5 and 6 are arranged along the sensor body 4, d. H. into the leaf level, separated into a number of individual electrodes. Each of these individual electrodes has a supply line 24.
  • the individual supply lines 24 are arranged in a shielded manner between the first and the second base electrodes 8 and 22.
  • the mode of operation of the anti-pinch sensor 2 'with regard to the detection of a trapping case corresponds to that of the anti-pinch sensor 2 according to FIG Fig. 2 ,
  • the separate control of the individual electrodes via the various leads 24 allows a spatial resolution of the detected pinching.
  • the measuring electronics 3 can in this case be designed such that the measuring capacitances of the individual electrodes are evaluated to each other either serially or in parallel.
  • Fig. 4 3 shows that the pinching sensor 2 "next to the base electrode 8, the first measuring electrode 5 and the second measuring electrode 6 now has a third, in a plane between the first and the second measuring electrode 5 and 6 arranged measuring electrode 27 includes.
  • the second measuring electrode 6 is arranged in an edge region of the sensor body 10.
  • the first, second and third measuring electrodes 5, 6 and 27 are elastically supported by the elastic sensor material 10 with respect to the base electrode 8.
  • Pinch sensor 2 For controlling the in Fig. 4 Pinch sensor 2 "shown is the first measuring electrode 5 - as in Fig. 1 shown opposite the ground potential applied to an alternating voltage, while the second and the third measuring electrode 6 and 27 are connected as the base electrode 8 via a defined impedance to the ground potential. The result is an external electric field 17 between the first measuring electrode 5 and the second measuring electrode 6. Also, an inner electric field 18 is formed between the first measuring electrode 5 and the base electrode 8. Furthermore, due to the potential difference between the first measuring electrode 5 and the third measuring electrode 27, a second external electric field 30 is formed.
  • the first external electric field 17 extends further into the space than the second external electric field 17 between the first measuring electrode 5 and the closer third measuring electrode 27.
  • a measuring capacitance between the first measuring electrode 5 and one of the two further measuring electrodes 6 or 27 can now be evaluated.
  • the behaves in FIG. 3 illustrated pinch sensor 2 "analogous to that in Fig. 1 or 2 Pinch sensor 2 shown.
  • the pinch sensor 2 to determine the difference between the two measuring capacitances formed between the first measuring electrode 5 and the second measuring electrode 6 or between the first measuring electrode 5 and the third measuring electrode 27 Detection advantageously makes it possible to distinguish a superficial deposit on the sensor body 4 and the resulting changes in the measuring capacitances from an actual trapping case, namely, whereas superficial deposition on the sensor body 4 leads to an approximately identical change in the two measuring capacitors considered this is not the case when the obstacle approaches the far field or when the force is applied directly to the sensor body 4.
  • the dimensions and the arrangement of the measuring electrodes 5, 6 and 27 are selected so that in a ground state, the two measuring capacitances between the first measuring electrode 5 and the second measuring electrode 6 and between the first measuring electrode 5 and the third Messelekrtrode 27 approximately the same size are.
  • a superficial deposit on the sensor body 4 then leads to no drift between the measuring capacitances.
  • a non-contact and a By contrast, the obstacle actively detected by contact leads to a measurable drift of the measuring capacitances and can be detected as a trapping case.
  • Fig. 5 is in turn in a cross section of the pinch sensor 2 according to Fig. 1 shown again, with a water deposit 35 is now on the surface of the sensor body 4.
  • the water deposit 35 acts like the introduction of a dielectric into the field between the first measuring electrode 5 and the second measuring electrode 6. Since water has a higher dielectric constant than air, this will increase the measuring capacity.
  • the coupling between the first measuring electrode 5 and the second measuring electrode 6 weakens on the one passing through the measuring electrodes 5 and 6 capacitor storable charge is reduced or field lines are subtracted from the external electric field 17.
  • the latter is illustrated by the marked field lines 34, which now lead from the first measuring electrode 5 to the hand 32.
  • the measuring capacity between the first measuring electrode 5 and the second measuring electrode 6 weakens.
  • the measurement of the differential measuring capacitance between the first measuring electrode 5 and the second measuring electrode 6 makes it possible to distinguish between a reminder approaching from a distance and superficial depositing.
  • the measuring capacity weakens.
  • the measuring capacity increases as a result of the introduced dielectric. If the human hand 32 finally penetrates into the near field of the pinching sensor 2, the dielectrical effect may possibly outweigh that of the ground fault.
  • an obstacle and a superficial deposit is possible.
  • an increasing measuring capacity is always preceded by a phase of a decreasing measuring capacity.
  • the measuring capacity will increase without a previous decrease.
  • a change in the measurement capacity due to an obstacle has a rather short time constant, while a change in the measurement capacity due to superficial application shows a larger time constant.
  • Fig. 6 is schematically similar in a three-dimensional view of the construction of a pinch sensor 2 Fig. 1 shown. It can now be seen that the sensor body 4 extends substantially along a longitudinal direction 36. In this case, the pinch sensor 2 or the sensor body 4 is formed from a flexible carrier material 37. In this carrier material 37 designed as individual electrodes 38 measuring electrodes 5 and 6 are embedded. The position of the measuring electrodes 5 and 6 with respect to the base electrode 8 can be seen from the cross section which can be seen in the front part. The individual leads to the individual electrodes 38 are not shown for reasons of clarity.

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  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Window Of Vehicle (AREA)
  • Power-Operated Mechanisms For Wings (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
EP08020675.8A 2007-11-30 2008-11-28 Capteur anti-pincement Withdrawn EP2066034A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202007016734U DE202007016734U1 (de) 2007-11-30 2007-11-30 Einklemmsensor

Publications (2)

Publication Number Publication Date
EP2066034A2 true EP2066034A2 (fr) 2009-06-03
EP2066034A3 EP2066034A3 (fr) 2014-11-05

Family

ID=40427815

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08020675.8A Withdrawn EP2066034A3 (fr) 2007-11-30 2008-11-28 Capteur anti-pincement

Country Status (3)

Country Link
US (1) US8228077B2 (fr)
EP (1) EP2066034A3 (fr)
DE (1) DE202007016734U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014147228A1 (fr) * 2013-03-22 2014-09-25 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Hallstadt Dispositif anti-pincement pour une partie de véhicule déplaçable

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202006009188U1 (de) * 2006-06-12 2007-10-18 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Einklemmsensor
KR20120081594A (ko) * 2009-10-02 2012-07-19 마그나 클로져 인크. 빗물 보상을 갖춘 차량용 끼임방지 시스템
JP2011158336A (ja) * 2010-01-29 2011-08-18 Asmo Co Ltd 感圧センサの製造方法及び感圧センサ
KR101017096B1 (ko) * 2010-09-30 2011-02-25 (주)펄스테크 장애물 감지용 센서스트립 및 그 결합구조
DE102011078077A1 (de) * 2011-06-24 2012-12-27 Ident Technology Ag Leiterplatte mit Elektrodenkonfiguration eines kapazitiven Sensors
DE102011054690B4 (de) * 2011-10-21 2016-05-12 Ident Technology Ag Elektrodeneinrichtung für eine kapazitive Sensoreinrichtung zur Positionserfassung
DE102012107116A1 (de) * 2012-08-02 2014-02-06 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Hallstadt Verfahren zur Steuerung einer Verstellbewegung eines Fahrzeugschließelements mit Kollisionsvermeidung für einen Schlossbereich und Einklemmschutzsystem
DE102013001066B4 (de) 2013-01-23 2022-01-20 Brose Fahrzeugteile Se & Co. Kommanditgesellschaft, Bamberg Kapazitiver Näherungssensor
CN106320890B (zh) * 2015-06-29 2019-03-29 长城汽车股份有限公司 车门防夹保护装置及其控制方法
US10087671B2 (en) 2016-08-04 2018-10-02 Ford Global Technologies, Llc Powered driven door presenter for vehicle doors
DE102016214614A1 (de) * 2016-08-05 2018-02-08 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Bamberg Kapazitiver Näherungssensor
EP3287585A1 (fr) 2016-08-22 2018-02-28 Captron Electronic GmbH Capteur anti-pincement capacitif
US10329823B2 (en) * 2016-08-24 2019-06-25 Ford Global Technologies, Llc Anti-pinch control system for powered vehicle doors
FR3062205B1 (fr) * 2017-01-23 2020-01-31 Fogale Nanotech Dispositif capacitif de detection d'un objet electriquement flottant
DE102017209250A1 (de) * 2017-05-31 2018-12-06 Deutsches Zentrum für Luft- und Raumfahrt e.V. Induktiver Touch-Sensor und Verfahren zum Betreiben eines solchen
DE102017216115A1 (de) * 2017-09-12 2019-03-14 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Bamberg Verfahren zur Verstellung einer Seitentür eines Kraftfahrzeugs und zugehöriger Einklemmschutzsensor
KR102098693B1 (ko) * 2018-01-12 2020-04-08 주식회사 지티에스엠 웨이퍼의 챔버에 대한 갭핑을 감지하는 웨이퍼형 갭핑 감지 센서
JP7159853B2 (ja) * 2018-12-26 2022-10-25 株式会社アイシン タッチセンサ装置
DE102019206670A1 (de) * 2019-05-09 2020-11-12 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Kapazitives Sensorsystem und Verfahren zur multimodalen und/oder ortsselektiven Messung von Kräften, Verformungen und/oder Objekt-Näherung
DE102019112962A1 (de) * 2019-05-16 2020-11-19 Karlsruher Institut für Technologie Sensormodul, -system und Verfahren zum Betreiben des Sensormoduls und -systems
DE102019209439A1 (de) * 2019-06-28 2020-12-31 Robert Bosch Gmbh Kapazitiver Drei-Elektroden-Sensor zur sicheren Fernbereichsdetektion
CN111735561A (zh) * 2020-07-29 2020-10-02 河北工业大学 一种机器人用柔性接近觉和触觉双模传感器
EP3992670A4 (fr) * 2020-09-07 2022-08-03 Shenzhen Goodix Technology Co., Ltd. Appareil de détection de proximité et dispositif électronique

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1154110A2 (fr) 2000-05-12 2001-11-14 Anthony Dr. Bledin Dispositif de protection anti-coincement
EP1455044A2 (fr) 2003-03-07 2004-09-08 Metzeler Automotive Profile Systems GmbH Dispositif pour détecter un obstacle dans la zone d'ouverture d'un élément mobile de fermeture
US6972575B2 (en) 2000-08-21 2005-12-06 Delphi Technologies, Inc. Capacitive proximity sensor

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4006119A1 (de) * 1990-02-27 1991-08-29 Ines Gmbh Kapazitives wegaufnehmersystem
US5223796A (en) * 1991-05-28 1993-06-29 Axiomatics Corporation Apparatus and methods for measuring the dielectric and geometric properties of materials
US5373245A (en) * 1993-07-12 1994-12-13 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Capaciflector camera
US5844415A (en) * 1994-02-03 1998-12-01 Massachusetts Institute Of Technology Method for three-dimensional positions, orientation and mass distribution
ATE295629T1 (de) * 1996-12-10 2005-05-15 David W Caldwell Differentieller berührungssensor und steuerungsschaltung dafür
US7162928B2 (en) * 2004-12-06 2007-01-16 Nartron Corporation Anti-entrapment system
FR2842853B1 (fr) * 2002-07-23 2005-02-04 Valeo Electronique Capteur de presence pour poignee d'ouvrant, notamment pour vehicule automobile
AU2003292623A1 (en) * 2002-12-25 2004-07-22 Act Elsi Inc. Electrostatic capacity detection type proximity sensor
DE10307673A1 (de) * 2003-02-21 2004-09-02 Kiekert Ag Auslösesignalgeber
US7116117B2 (en) * 2004-02-16 2006-10-03 Honda Motor Co., Ltd. Capacitive sensor
JP3956369B2 (ja) * 2004-02-16 2007-08-08 本田技研工業株式会社 静電容量型センサ
DE202006009189U1 (de) * 2006-06-12 2007-10-18 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Taktiler Sensor
DE202006009188U1 (de) * 2006-06-12 2007-10-18 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Einklemmsensor
DE202006010813U1 (de) * 2006-07-13 2007-11-22 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Einklemmsensor sowie Auswerteschaltung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1154110A2 (fr) 2000-05-12 2001-11-14 Anthony Dr. Bledin Dispositif de protection anti-coincement
US6972575B2 (en) 2000-08-21 2005-12-06 Delphi Technologies, Inc. Capacitive proximity sensor
EP1455044A2 (fr) 2003-03-07 2004-09-08 Metzeler Automotive Profile Systems GmbH Dispositif pour détecter un obstacle dans la zone d'ouverture d'un élément mobile de fermeture

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014147228A1 (fr) * 2013-03-22 2014-09-25 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Hallstadt Dispositif anti-pincement pour une partie de véhicule déplaçable
US9540858B2 (en) 2013-03-22 2017-01-10 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Hallstadt Anti-trap protection method and device for an adjustable vehicle part

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US8228077B2 (en) 2012-07-24
DE202007016734U1 (de) 2009-04-09
EP2066034A3 (fr) 2014-11-05
US20090146827A1 (en) 2009-06-11

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